//
//  XJ_MenuViewController.m
//  QQMenuDemo
//
//  Created by lanou3g on 16/4/15.
//  Copyright © 2016年 ZhangXJ. All rights reserved.
//

#import "XJ_MenuViewController.h"

// 抽屉展开的程度
#define kMenuLeftWidth [UIScreen mainScreen].bounds.size.width * 0.8
#define kMenuLeftHeigt [UIScreen mainScreen].bounds.size.height


@interface XJ_MenuViewController ()<UITableViewDataSource, UITableViewDelegate>
//
//// 默认左侧tableView
//@property (nonatomic, strong) UITableView *leftTableView;

@property (nonatomic, assign) CGFloat x;
@end

@implementation XJ_MenuViewController
// 判断当前是否展开
- (BOOL)isShowing {
    if (self.centerViewController.view.transform.tx > 0) {
        return YES;
    }
    return NO;
}
// 初始化方法
static XJ_MenuViewController *XJ_menuVC = nil;
+ (instancetype)instanceWithLeftViewController:(UIViewController *)leftVC CenterViewController:(UIViewController *)centerVC {
    @synchronized(self) {
        if (!XJ_menuVC) {
            
            XJ_menuVC = [[XJ_MenuViewController alloc]init];
            // 设置window的rootViewController
            [UIApplication sharedApplication].keyWindow.rootViewController = XJ_menuVC;
            // 设置属性
            XJ_menuVC.leftViewController = leftVC;
            XJ_menuVC.centerViewController = centerVC;
            // 添加子视图控制器和子视图
            if (leftVC) {
                [XJ_menuVC addChildViewController:leftVC];
                [XJ_menuVC.view addSubview:leftVC.view];
            }else {
                [XJ_menuVC setupLeftViewController];
            }
            if (centerVC) {
                [XJ_menuVC addChildViewController:centerVC];
                [XJ_menuVC.view addSubview:centerVC.view];
            }
        }
    }
    return XJ_menuVC;
}


// 默认的菜单视图
- (void)setupLeftViewController {
    self.leftTableView = [[UITableView alloc] initWithFrame:CGRectMake(-kMenuLeftWidth, 0, kMenuLeftWidth, kMenuLeftHeigt) style:UITableViewStylePlain];
    // 设置数据源
    self.leftTableView.dataSource = self;
    // 代理
    self.leftTableView.delegate = self;
    [self.view addSubview:self.leftTableView];
}


- (UIStatusBarStyle)preferredStatusBarStyle {
    return UIStatusBarStyleLightContent;
}

#pragma mark - UITableViewDataSource
// 数据源代理方法
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    return self.menuArray.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    static NSString *reuserID = @"cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:reuserID];
    if (!cell) {
        cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:reuserID];
    }
    cell.textLabel.text = self.menuArray[indexPath.row - 1];
    cell.backgroundColor = [UIColor grayColor];
    return cell;
}
// menuArray的setter方法
- (void)setMenuArray:(NSMutableArray *)menuArray {
    if (_menuArray != menuArray) {
        _menuArray  = nil;
        _menuArray  = menuArray;
        [self.leftTableView reloadData];
    }
}

#pragma mark - UITableViewDelegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    // 取消选中状态
    [tableView deselectRowAtIndexPath:indexPath animated:YES];
    // 代理 传值
    if ([self.menuDelegate respondsToSelector:@selector(didClickMenuIndex:Title:)]) {
        [self.menuDelegate didClickMenuIndex:indexPath.row Title:self.menuArray[indexPath.row]];
    }
    // 关闭抽屉
    [self hideLeftViewController];
}




// 获取抽屉方法
+ (instancetype)getMenuViewController {
    return XJ_menuVC;
}

// 展示左侧菜单
- (void)showLeftViewController {
    
    // 动画展开
    [self showLeftViewController:0.7];
}
- (void)showLeftViewController:(CGFloat)duration{
    [UIView animateWithDuration:duration animations:^{
        self.centerViewController.view.transform = CGAffineTransformMakeTranslation(kMenuLeftWidth, 0);
        self.leftViewController.view.transform = CGAffineTransformMakeTranslation(kMenuLeftWidth, 0);
        self.leftTableView.transform = CGAffineTransformMakeTranslation(kMenuLeftWidth, 0);
    }];
    
}
// 关闭左侧菜单
- (void)hideLeftViewController {
    [self hideLeftViewController:0.7];
}
- (void)hideLeftViewController:(CGFloat)duration {
    // 动画关闭
    [UIView animateWithDuration:duration animations:^{
        self.centerViewController.view.transform = CGAffineTransformMakeTranslation(0, 0);
        self.leftViewController.view.transform = CGAffineTransformMakeTranslation(0, 0);
        self.leftTableView.transform = CGAffineTransformMakeTranslation(0, 0);
    }];
}





- (void)viewDidLoad {
    [super viewDidLoad];
   
    
    // 手势
    UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(panMenuWithPanGesture:)];
    [self.view addGestureRecognizer:pan];
    // Do any additional setup after loading the view.
}

#pragma mark - 添加手势打开抽屉
// 静态变量保存初始状态
static CGPoint begin;
static CGAffineTransform transform;
- (void)panMenuWithPanGesture:(UIPanGestureRecognizer *)pan {
    
//    //设置菜单的内边距
//    self.leftTableView.contentInset = UIEdgeInsetsMake(30, 0, 0, 0);

    // 位移量
    CGPoint translatePoint = CGPointZero;
    // 开始手势时的位置
    if (pan.state == UIGestureRecognizerStateBegan) {
        begin = [pan locationInView:self.view];
        transform = self.centerViewController.view.transform;
    }
    // 手势过程中的位置
    if (pan.state == UIGestureRecognizerStateChanged) {
        CGPoint end = [pan locationInView:self.view];
        translatePoint = CGPointMake(end.x - begin.x, 0);
        self.x = end.x - begin.x;
    }
    // 手势结束时的位置
    if (pan.state == UIGestureRecognizerStateCancelled || pan.state == UIGestureRecognizerStateEnded) {
        if ([pan velocityInView:self.view].x > 0) {
            // 动画设置动画时长
            [self showLeftViewController:0.13];
        }else {
            [self hideLeftViewController:0.13];
        }
        return;
    }
//    //手势结束时
//    if (self.x < 0 || self.x > 0) {
//        return;
//    }
    
    // 手势过程中，对视图进行位移
    if(self.centerViewController.view.transform.tx >= 0 && self.centerViewController.view.transform.tx <= kMenuLeftWidth) {
        
        self.centerViewController.view.transform = CGAffineTransformTranslate(transform, translatePoint.x, 0);
        self.leftViewController.view.transform = CGAffineTransformTranslate(transform,translatePoint.x, 0);
        self.leftTableView.transform = CGAffineTransformTranslate(transform, translatePoint.x, 0);
    }
}



- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

/*
#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    // Get the new view controller using [segue destinationViewController].
    // Pass the selected object to the new view controller.
}
*/

@end
